*{
	margin: 0;
	padding: 0;
}
#navigation{
	width: 302px;
	height: 402px;
	margin: 100px auto;
	border: 1px solid #ADADAD;
}
ul{
	list-style: none;
	overflow: hidden;
	background-color: skyblue;
}
ul li{
	width: 100px;
	height: 80px;
	float: left;
}
ul .now{
	background-color: pink;
}
ul li a{
	display: block;
	width: 100px;
	height: 80px;
	text-decoration:none ;
	color: #000000;
	text-align: center;
	line-height: 75px;
}
#content div{
	display: none;
}
#content .current{
	display: block;
}